I posted this on another thread, but am concerned that it might have been buried…
Trivia Question:
What is the largest contiguous old-growth, own-rooted Zinfandel vineyard in California?*
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- “Old-growth”: older than 75 years.
Answer Here
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Evangelho?
Own rooted was the kicker for me. But it’s not all Zin, lots of Mourvèdre and Carignane so maybe not.
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Largest? That one is the curveball. Going to guess Monte Rosso.
Own rooted is the one that narrows the field drastically.
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Was going to say Evangelho as well. Gotta be!
I would guess that it’s in Lodi.
Morisoli in Napa
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Kirschenman?
Bechtold has less zin i think.
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St. Georges, where Birichino gets its Zin? Not sure how big it is.
Own rooted is most likely in the Delta, where the sandy “Delhi” soil is phylloxera resistant. Which makes Evangelho a good call. But it’s not the only place…
Does it have to be 75% Zin to qualify? 
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What exactly does “own-rooted” mean?
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As far as phylloxera resistance, wouldn’t Amador county be a possibility?
I realize that Lodi vineyards are usually much larger, but was that the case 75 years ago?
It means the vines were not grafted to a rootstock.
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The correct answer has not been given yet.
The size of a few suggested answers:
· Evangelho - 36 acres
· Bechthold - 25 acres (not Zin)
· Besson St Georges - ?? (The entire Besson family’s western parcel of land is 109 acres in size, but vines only occupy a portion, with many newer plantings; it is very unlikely that Zin/Mission vines take up more than ~20 acres)
· Morisoli - 53-acres (is it own-rooted?)
· Kirschemann - 19 acres
Hint: The site is not in Napa, Mendocino, Sonoma, Santa Barbara, Santa Clara, or Santa Cruz Counties.
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Ueberroth
I don’t know the answer, but since it hasn’t already been said, how about Oakley Road Vineyard in Contra Costa County?
How about the Lopez Vineyard in the Cucamonga Valley?
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I’ll take a guess - Pagani Ranch?
Good guess. I drive by Lopez Vineyard all the time when driving to visit my mom and I do not think it is that large.
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Bedrock?